Children may no longer have to wear an arm cuff to detect their blood pressure.
Researchers at Georgia Regents University have developed a urine test that can accurately predict a child's blood pressure by measuring the sodium level in the child's urine.
Researchers said this is because when the body retains salt or sodium, it increases fluid in the blood vessels, which can affect blood pressure.
The researchers say the urine test may be more accurate than using a traditional blood pressure cuff, especially since sodium levels can fluctuate when a child is nervous.
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